Lever for screw drivers



15, 1950v E. L. CLARKE 2,518,755

- LEVER FOR SCREW DRIVERS Filed Aug. 2, 1946 Patented Aug. 15, 1950 f- UNITED STATES PATENT OFFICE LEVER FOR soREw DRIVERS Edward L; Clarke, Scranton, Pa. ApplicationAugust 2, 1946, Serial No. 687,855

al y I My invention relates to improvements in screw drivers and the like, and has for its primary objectf to provide novel and improved lever means .which is readily attachable to the screw driver shank so that great leverage! can be applied for starting an over-tightened screw.

It is also an object of the invention to provide a screw driver having an anti-friction handle piece and a detachable shank-actuating lever whereby turning leverage can be readily applied to the tool while maintaining it centered with the work. 7 v 7 Another object of the invention is to provide a screw driver attachment, as characterized, which very simple in construction, economical to manufacture, and which can be readily applied -to the screw driver shank, as the occasion may require. 7

.- 7 Additionally, the invention contemplates a device of this kind which incorporates at least'one removable handle portion, the advantage of such arrangement being that when working adjacent a wall, leverage can be applied to the screw driver shank .While still maintaining the screwdriver perpendicular to the work. It is also apparent :F-invention is that the removable laterally extending handle can berdetached from the assembly leaving the other handle gripped to the screw driver shank; and when it is desired to use both laterally extending handles the removable one can be replaced while the other is still clamped to the screw driver shank.

Other objects and advantages of the invention will be understood and appreciated by mechanics upon reference to the accompanying drawing, in connection with the detailed description which follows.

In the drawing, wherein the same reference characters have been used to designate the same parts throughout the several views- Fig. 1 is a side elevational view of a screw driver embodying my invention;

Fig. 2 is a cross sectional View through the screw driver illustrated in Fig. l, the view having been taken on the line 2--2 of Fig. 1, so as to show the lever attachment in plan;

Fig. 3 is a cross sectional view taken on the line 3-3 of Fig. 2;

Fig. 4 is a perspective view of a clamp block which is incorporated in the lever attachment;

blade 6a..

Adjacent the reduced inner end of the handle to of the screw driver, the shank thereof is squared or otherwise flat-faced,as indicated at 62). The object of this flat-faced rormation'tb is to non-rotatably receive opposed clam'plelement recesses T, of thele verattachment, which will now be described.

By preference, the flat-faced or squared shank portion 6b will be raised slightly from the adjacent surface of, the shank 6 so that the clamp can be slid off readily when loosened. However, this raising of the flat-faced clamp engaging portion is to be regarded as optional because, of

course, when the handle, incorporating; clamp is applied to an ordinary screw driver, production of thefiat-surfaced portion 619 of the shank thereof, will necessarily be accomplished by; filing or milling away a part of the shank.

Coming now to the novel handle incorporating clamp, it will be seen that the same comprehends the rectangular block 8 and the matching inner end portion 5!, of a laterally extending handle ea.

i 3 us ra es t e. op osed m t inen ftions of the block 8 and handle 9, 9a," as being provided with lineally extending recesses 8a, 91), respectively, disposed in opposition to one another. In the present instance, these recesses 8a, 9b, are depicted as being of rectangular cross section and as receiving the similarly formed inner end [0, of a, removable handle Illa, which projects laterally from the opposite side of the shank from the handle 9a.

As best shown in Fig. 2, the members 8, 9 are provided with opposed V-shaped notches l, which are adapted to receive the squared or flattened shank portion 61), so that when the parts 8, 9, are clamped together, the shank 6, 6b will be nonrotatably assembled therewith.

Means, in the form of wing headed clamp screws or the like II, are availed of for clamping the block 8 and handle end 9 together. Fig. 2 of the drawing illustrates one clamp screw II as extending through a hole l3 in block 8 and threaded into the aligned threaded hole I4 in the blocklike end 9 of lever or handle 9a. The other clamp 3 screw II is inserted through a hole 14a in the block-like handle end 9, and threaded into an aligned hole 13a in the opposed block 8. Of course the wing heads of screws H can both be at the same side of the device if desired.

In the case of the clamp screw II which is adjacent the removable handle Ill, [0a, it may, and preferably does, go through a hole in the squared end ll] of said removable lever or handle iila.

Of courseclampscrews H, of othe'r than the wing headed type may be used, such as those having lineally serrated heads.

As will be understood from Figs. 2 and 3, re-

moval of the associated clamp screwll isnee essary when lever 20, Illa is to be removed. How ever, if the squared end ID of the removable lever Illa terminates short of the adjacent .olamp screw I I, the removable handle 10a, It) can :be. pulled out-- after simple loosening said adjacent screw I I. In either event, hcwever, removal of handle 50, [0a

"enables the screw driver to beused in the mannerof awrench, when available working-space is limited. Even if screw II--goes throughtheend ll) of 'thehandle Illa, the latter can beremoved by removing the screw H. The-*companienscrew 'H on the opposite side oi -the shank-'5 will'keep the clamps 8, Sin assembly "withthe-screw'di'iver shank 6;

Manipulation of the screw-driver, embodying my invention, is greatly facilitated by the reason "of'the rotatable palm support I 5, at the outer end of the handle 60, as shown'inFi'g; 11 This rotatable palm grip, in the'illustrated formof the invention, is indicated as a preferabl friction annulus l5, seated in the peripheralU-shaped groovelEa of a hub-lEb. The hub i's-rotatably'setake other form without departing fromth'espirit and scope of thesubject matter "claimed herein'after.

Having thus described my invention, what-I claim as new is:

I L A lever attachment for-screwdriver Shanks corn'prising'in combination a-firstlaterally-extending handle terminating at its-inner portion in a clamping block like end-and having a lineally extending recess therein and also having a V- shaped groove formed in one face thereof, said block-like end having spaced screw receiving openings extending transversely therethrough, a rectangular clamping block element spaced opposite to the block-like end of the handle, said rectangular block element having a V-shaped groove in its face and having a lineally extending recess andspaced screw receiving openings, a second laterally extending handle having. a flattened inner end fitting Within the opposed lineally extending recesses of the clamping block and clamping block-like handle end, the inner end of said second handle having an opening therethrough,

and wing, headed screws extending through the spaced openings of the handle end and the rectangular block, one of the screws passing through the. opening in the removable handle member, thereby to clamp the oppositely disposed handles to the screw driver shank.

2-; A- layer attachment for "screw driver-shanks comprising incombination a first laterall -extending handle terminating at its inner portionlin a rectangular shaped clamping. block having-1a lineallyextendlngrecess therein and further provided with spaced-screwreceiving openings andn V-notch for receiving the shank: ofa: screw driver, aseco'ndcooperating clamping block-:having alineallydisposed recess therein oppositely disposed'with respect to-the-rec'ess-of the' 'firstmentioned*clampingbleck, said'second'block having spaced screw receiving openings and a: V:- notch therein, a' second laterally extending handle providedwvith a flattenedend f'or' fitting the lineally disposed recesses of the cl-amping'block's, and an openingin the-said handle-endg and screws extending through the screw-receiving openings in the opposed clamping blocks, one of the screws engaging the opening'in theendof the-second handle.

EDWARD L; CLARKE:-

REFERENCES: CITED The following references "are'of record i'rrtlr file of this patent:

UNITED STATES PATENTS.

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484,050 Rogers Oct; :1!l; l.892 1,096,529 Egglest'on: e s .=May. 12,.1914 1,3143012 Mowers. Aug;26, -119 1,410,611- seillon' etfiah. :Man: 28; 19.22 2,160,664 Kuhnee May 36,1939 

